ok so im sitting at a red light, the light turns green and i hit the gas and keerplunk! my poor ol chevy took a poop. my first thought was Fuel pump... not the answer, all the relays check out ok, fuses good just bought a new ecm. about 1 hr. ago and that wasnt it. injectors are not spitting any gass!!!! on the ignition side of things everything checks out. I'm furious at the fact that i can't figure it out... ANY SUGGESTIONS?

 

CHECK YOUR FUEL PRESSURE just because the relay works doesnt mean that the pump is working enough to "pop off" the injector.......and recheck the basics ,air,fuel,spark and compression we already know its not getting fuel but check the rest because of how integrated these systems are if your missing more than just fuel this will help with diag....if its just fuel you are missing than I would say its the pump.....but a pressure test will confirm or deny that

 

What kind of truck? Year, model, miles, motor, etc...

 

94 chevy 2wheel 4.3vortec 145xxx miles auto. tbi 4L60e

 

use a noid light to check injector pulse and check your fuel pressure

 

X3 - check your fuel pressure. Use a gauge and hook it to the valve in the fuel rail.